- Stack temperature greater than 200 C indicates potential for recovery of waste heat
- Uncontrolled continuous blowdown is very wasteful.
- Add a waste heat recovery system to blowdowns.
- Elevated stack temperature may indicate excessive soot build up or scaling on the water side.
- Stack temperatures should be checked and recorded regularly as an indication of soot deposits.
- Throttling dampers lack accuracy, they may be replaced by variable speed drive.
- 22 C reduction in flue gas temperature increases boiler efficiency by 1%
- 6 C raise in feed water temperature by economiser, condensate recovery system corresponds to 1 % saving in fuel consumption.
- 20 C raise in preheated combustion air temperature by waste heat recovery results in 1 % fuel saving.
- A 1mm thick scale deposit in the water side could increase fuel consumption by 5-8%
- A 3 mm thick soot deposits on the heat transfer surface can cause in fuel consumption to the range of 2-5%
- 0.25mm thick air film offers the same resistance to heat transfer as a 330mm thick copper wall
- 70% heat loss can be reduced by floating a layer of 45mm diameter polypropylene(plastic) balls on surface of 90 C hot liquid.
- 6% increase in GDP would contribute to 9% increase in energy demand.
Power Plant - Thumb Rules
Labels: Power Plant